Car-chock.



SAMUEL RUSH KEERAN, OF CENTRALIA, MISSOURI.

CAR-CHOCK.

Specification of Letters Patent.

Patented Sept. 17, 1907.

Application filed May 13,1907. Serial No. 373,359.

To all whom 'it may concern:

Be it known that I, SAMUEL RUSH KEERAN, a citizon of the United States,residing at Centralia, in the county of Boone and State of Missouri,have 'invented new and useful Improvements in Car-Checks, of which thefollowing is a specification.

This invention relates to improvements in car wheel chocks for checkingthe wheels oi steam excavators and the wheels of other cars of otherkinds and which consists in the construction, combination andarrangement of devices hereinafter described and claimed.

The object of my invention is to provide an improved car chock of simpleconstruction which is adapted' to be placed on a track rail and whichcomprises a pair of chock blocks movable simultaneously in oppositedirections, connected together for longitudinal movement and providedwith means for moving them simultaneously into and out of contact withthe tread of the wheel, as hereinafter stated.

In the accompanying drawing, Figure l is a side elevation of a car wheelchock constructed in accordance with my invention7 'showing the sameapplied to a car wheel, the latter being indicated in dotted lines. Fig.2 is a similar view showing the blocks of the chock moving apart toenable the chock to be disengaged from thecar wheel. Fig. 3 is a topplan view of the same, showing the blocks in contact with each other forengagement with a car wheel. Fig. 4 is a transverse sectional view ofthe same, and Fig. 5 is an inverted detail perspective view of a shoewhich may be attached to the underside of one of the chock blocks tofrictional grip the rail and prevent the chock from slipping.

In accordance with my invention, I provide a pair of chock blocks 1which may be made of suitable material, are adapted to be placed on arailroad track and have inner opposing ends rounded or hollowed as at 2to adapt them to bear against the periphery or tread of a car wheel. Thesaid rounded hollow ends of the said blocks are also provided withrecesses 3 for the reception of the flanges of the wheel. From outersides of one of the said blocks project a pair of eye-bolts 4, saideye-bolts being disposed transversely of the said block. In the otherblock is journaled a transversely disposed rock shaft 5 which isprovided with rock arms G and is also provided at one end with a crank 7whereby it may be turned.

A pair of longitudinally disposed and adjusting rods 8 are providedwhich are disposed on opposite sides of the chock blocks, have theirfree ends extended through the eye-bolts 4 and their opposite ends bentto provide substantially semi-circular arms 9 which are pivotallyconnected to the rock arms 6 of the shaft 5, as at l0. The free ends ofthe said rods are screw-threaded as at 11 and on the same are placedcoil springs l2 which bear against the outer sides of the eye-bolts 4.Adjusting nuts are screwed on the said yrods 8 and bear against theeye-bolts 4 and the outer ends of the said springs and may be adjustedon said rods 8 to vary the tension of the said springs, as will beunderstood.

When the rock shaft 5 is turned in one direction to cause therock arms Gthereof to draw the rods 8 toward such rock shafts, the said rods willcause the blocks to move toward each other and become applied toopposite sides of a `-Wheel, as indicated in Fig. l. When the said rockshaft has been turned far enough to dispose its rock arm 6 past the deadcenter, said rock shaft will prevent reverse movement of the said rods 8and will co-act with the springs l2, yieldingly holding the chock blocksagainst opposite sides of the periphery of the wheel. By turning therock shaft 5 in the reverse direction, which may be done by means of thecrank 7, to dispose the arms 6 of said rock shaft in the position shownin Fig. 2, the rods 8 may be moved in the reverse direction to cause theblocks l to be moved apart so that they may be readily disengaged fromthe wheel.

To prevent the possibility of the blocks slipping on a rail, each ofthesaid blocks may, if preferred, be pro-` vided on its under side with ashoe plate l5 of iron or steel, having a roughened file-like undersurface to bite into and engage the rail.

Having thus described the invention, what I claim as new and desire tosecure by Letters Patent isz- 1. A chock of the class describedcomprising a pair of blocks to lie on a rail and engage opposite sidesof the periphery of the Wheel, rods connected to one of such blocks andmeans on the other block connected to such rods for operating the latterto cause the same to move the blocks toward or from each other.

2. A chock of the class described comprising a pair of blocks,connecting rods attached to one of the blocks, a shaft journaied in thesaid block, and meanson the said shaft connected to the said rods tomove the latter longitudinally when said shaft is turned, for thepurposes set forth.

3. A chock of the class described comprising a pair of chock blocks,longitudinally disposed rods attached to one of them, a shaft mounted inthe other, and rock arms on the said shaft pivotally connected to thesaid rods, said shaft being further provided with means whereby it maybe turned, for the purposes set forth.

4. A chock of the class described comprising a pair of chock blocks,guide devices projecting from opposite sides of one of said blocks, arock shaft journaied in the other block and having rock arms and meanswhereby it may be turned, longitudinally disposed rods attached to thesaid rock arm and extending through the guide devices, springs on saidrods and stop devices on said rods pressing said springs against saidguide devices to exert longitudinal-y tension on the said rods in onedirection, substantially as described.

In testimony whereof, I affix my signature in presence of two Witnesses.SAMUEL RUSH KEERAN.

Witnesses:

JaMns W. BUTTER, HARVEY L. Knr.

